﻿    <p>
      This enumeration defines the different layout types of grids.
      Restriction on the correct use of <em>IfcGrid</em>
      instantiations may be imposed depending on the value of the
      <em>PredefinedType</em> being <em>IfcGridTypeEnum</em>.
    </p>
    <blockquote class="history">
      HISTORY&nbsp; New enumeration in IFC4.
    </blockquote>
    <p>

    <blockquote class="note">
      NOTE&nbsp; View definitions or implementer agreements may
      impose further restrictions on how to populate the grid axes.
      The first grid axis being part of u-axes may have to be
      parallel to the x-axis of the grid object placement.
    </blockquote>